Drill-chuck.



V. R. KOONTZ.

DRILL CHUCK.

APYPLIGATION FILED FEB. 24,1913. L@ 1986 y Patented Mar. 81, 1914.

` jp 7 /5/ d/fj! 3 Z4? 1 @WW l Witnesses Inventor Attorneys remesa entre, srsrns naar renten.,

vieron-nf. Koomen, or wnvnnsnono, rnnnsvnvanre.

'Specification ofLetters Patent.

To all 'whom 'it may concern:

Be it known that l, lVieron' R. KooNrz, a'

citizen of the United States, residing at Waynesboro, ink the county of Franklin and State of Pennsylvania, haveinvented a new and useful Drill-Chuck, of whichv the following is a specication.,

The present invention relates to improvements in drill chucks, the primary object of the present invention being the provision of a novel means, whereby the drill may be-inserted and removedl during therotationA of the chuck, and which after properly inserted is held both against longitudinal and rotary movement independent of the chuck.

A further object of the present invention is the'provision of a novel means for locking `and releasingl the drill carrying member withinl the chuck, so that the same willunder normal 'conditions be rotated therewith and held against longitudinal movement, there being means .provided whereby the locking. meansmay be readily released during the rotation of the chuck so that the bit carrying member may be removed and inserted .at will. j

ith the foregoing and other objectsin view which will appear as thedescription proceeds, the invention resides in the combination and arrangement of partsV and inthe details of construction hereinafter described "andclaimed, it being understood that changes in the precise embodiment ofthe -inyvention herein disclosed can e made within the scope of what is claimed ithout departing from thespirit of the invention. l

lin the drawings-Figure 1 is a view showing the chuck and drill carrying member partially in longitudinal-section to illustrate the positioning of the arts, when in locked position. Fig. 2 is a si e elevation of thezbit` designates the. spindle ot the main chuck'.

whose enlarged socketed end 2 is provided with diametrically disposed curved recesses 3, for the sliding reception @ci2 the locking members or locks l, the engaging faces of 'jvhich are struck upon a curve disposed to alineA with the curve of the respective recesses 3 so thatja portion of the locking member will project within the socket of the member ,2. Bythis means a lock at two points is providedwithin the chuck member so as to hold the bit carrying member lllin rxed re- Patented Mar. 3l, leid. applicati@ mea February at, 191e.- -seriai No. 750,396.

lation to the chuck 2. Each of the locking l members, as clearly illustrated in Fig. d, is provided with the odset ends 5 and 6, the end 6 being provided with the cut away in,- clined portion 7, while-,formed between the projections 5 and 6 is the long recessediportion 8 provided with the transversely disposed groove 9, said grooves of both members lbeing so vpositionedasto receive the open spring ring 10, as clearly illustrated in `Fig. 1, so that both members l have a normal tension to project within the socket of `the chuck, to engage within the slot or de-. pressions 15 of the bit carrying member 1t,

as will presently appear.

ln order tov provide. a means for permit- "ting the retraction or' the locking members 4 and also to maintain them in projected position to lock the member 1d against Vindependent longitudinal and rotary movements, a "knurled sleeve 11y is disposed for sliding movement upon the outer surface of the enlarged end 2 of the chuck, the said lmember 11 being provided with the two recessed portions 12 and 13, which as said member 11 is moved to the left, as shown in Fig. 1, will be positioned in alinement with the respectiveprojecting ends 5 andv 6 of the members lso that as the member 14.- is moved outwardly or inwardly, the members d will be caused to be moved outwardly with the respective projections 5 and 6 projected or seated within the lrespective recesses 12 and 13. v

The drill carrying member 14e, as clearly shown, is provided with a transversely disposed slot 15, which is diametrically disposed to receive 'the projecting portion of the locking members l asthe member 1li is moved inwardly or outwardly of the socketed member 2, the spring 10 having a normal tension to snap such members Ztinto such recess 15 to lock the member le for lined movement with the chuk member 2. 4 'llhe member le is provided with the drill receiving socket le, and with the enlarged diametered portion 17- which .provides a shoulder to limit the inward movement oft the member 14 relatively to the socket -of the Chuck. Inorder to member 14 wit the bit (not shown) may be removed while the shank 1 and chuck meinber 2 are being rotated, thus not necessitating the sto png'of the lathev or drill press,

,screw plug 21 to permit of the introduction of the balls-in the position clearly shown in at is claimedis: Y

1. A drill chuck, including a shank, a

socket'ed drill-carrying reoeivin member, a

lurality 'ofv s ring projected rill member engaging mem ers, each of saiddrill mem? ber. engaging members being providedwith a air o projections, and a ongitudinally sli able sleeve mounted upon the chuck member' and provided with a plurality of v. recesses to be disposed into and out of registration with the projections of the locking members to maintain the members in l member.'- pl 4Ovide -a means, whereby theprojectedposition andto permit of the rev tract-ion thereof to releas'e'the-jdrill carrying a shank, an

2, A, drm chuck, inciudin' enlarged socketed head carrie thereby, said head being rovided with diametricallydisposed slots t rough the walls thereof, a lockv ing member disposed in each wall, ,each of 'saidlocking members being provided with -two spaced projections disposed to normally register with thecircumferential 'surface of the enlarged head, a `spring for maintaining all of the lockingvmembersprojected, and a 'sleeve mounted for longitudinal; slidingl movement upon -the enlarged head', said sleeve being provided with two: recessed portions, whereby the sleeve" normally holds the locking members -in projected position and when'moved to ,place ther'e'cess'es in, registration-with lthe projecting end sof the locking' members permits' the retractlonofV the locking members.

as my own, I have hereto aiiixed'- my 'signature 1n the presence of two witnesses.

Witnesses:

JOHN B. STONER Josnri-UNE ROLLMAN.

In testlmony that I claim the'foregoing VICTOR RQ KOON'IZ, 

